Why does Gilgamesh decide to seek out Utnapishtim, and what…

Why does Gilgamesh decide to seek out Utnapishtim, and what does this quest symbolize in “The Epic of Gilgamesh”? Additionally, how do the Scorpion-beings test Gilgamesh during his journey, and what do his interactions with them reveal about his determination and character? How do these events together reflect the broader themes of the epic, such as the search for immortality and the nature of heroism?